Apart from its enclosing earthwork there are no visible remains of this castle, which was located on the lower South slopes of Bentee Mountain. It is associated with the McCrohan branch of the O’Sullivan Mores (Smith 1756, 107), and is referred to as ‘Letirmiccrohan’ in RIA MS 24 K 43.

Mac
Crehin’s Castle: Apart from its enclosing earthwork
there are no visible remains of this castle, which was located on the lower
South slopes of Bentee Mountain. It is associated with the McCrohan branch of
the O’Sullivan Mores (Smith 1756, 107), and is referred to as ‘Letirmiccrohan’
in RIA MS 24 K 43. Occupied by one Cnogher MacCroghon on 1656 (King, 1931 223),
it was confiscated and granted to Alexander Eagers in 1667 (King 1909, 169). No
trace of the castle survived in 1841 (OSL), and Delap recorded that it had been
demolished to build adjoining farm houses (1910b, 227).

The surviving
remains at the site of the castle consist of a low rectangular platform, 30m
North-South x 32m East-West internally, which is defined by a bank and 2.25m in
width. Here the fosse, which is U-shaped in profile, averages 7m in width and
1.35m in depth. At East and West the bank and fosse are less well-defined. A
low causeway, 5.5m wide, interrupts the fosse midway along the slightly curving
East side and may indicate the location of the entrance to the earthwork. A
deeply channelled stream skirts this feature at East, and may have been bridged
at this point. Slight traces of a channel which may have served to direct water
from the stream into the fosse are visible extending from the latter’s midpoint
at North.

The interior of
the site is uneven and is raised slightly above external ground level. A slight
hollow of sub-rectangular shape, 18m North-South x 16m East-West, occurs in the
North West quadrant and is enclosed by a low back, 3m in average width. IN the
South East quadrant is a large, sod-covered sub-rectangular mound, 13.3m East –
West x 12.7m North – South, which may represent the location of the castle.
Raised 1.4m above internal ground level, it’s flat upper surface measures 8m
East – West x 7.2.m North South.